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Indexed by:会议论文

Date of Publication:2001-01-01

Included Journals:CPCI-S

Page Number:151-154

Abstract:The seismic response analysis of underground structures is very complex and difficult because of the dynamic wall rock-structure interaction and the uncertainty of earthquake excitation, especially for large scale underground caverns of hydroelectric power stations. The radiation damping of unbounded media have great effects on random response of underground structures. In this paper, a small parameter random perturbation pseudo-excitation method was derived for non-classical. damping soil-structural system. Based on it, the effect of seismic input mechanism such as incident direction, wave pattern, wave spatial coherence loss etc. on the random response of large scale underground caverns was studied incorporating with Xiluodu underground hydropower plant caverns located in seismically active area of southwest China. The results show that the proposed small parameter perturbation method is effective and high efficiency and the uncertainty of the seismic input have great effects on the seismic response of underground caverns.